This is a note to let you know that I've just added the patch titled

USB: Accept bulk endpoints with 1024-byte maxpacket

to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From fb5ee84ea72c5f1b6cabdd1c9d6e8648995ca7c6 Mon Sep 17 00:00:00 2001

From: Alan Stern stern@rowland.harvard.edu Date: Thu, 3 May 2018 11:04:48 -0400 Subject: USB: Accept bulk endpoints with 1024-byte maxpacket

Some non-compliant high-speed USB devices have bulk endpoints with a 1024-byte maxpacket size. Although such endpoints don't work with xHCI host controllers, they do work with EHCI controllers. We used to accept these invalid sizes (with a warning), but we no longer do because of an unintentional change introduced by commit aed9d65ac327 ("USB: validate wMaxPacketValue entries in endpoint descriptors").

This patch restores the old behavior, so that people with these peculiar devices can use them without patching their kernels by hand.

Signed-off-by: Alan Stern stern@rowland.harvard.edu Suggested-by: Elvinas elvinas@veikia.lt Fixes: aed9d65ac327 ("USB: validate wMaxPacketValue entries in endpoint descriptors") CC: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/core/config.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c index c821b4b9647e..7b5cb28ffb35 100644 --- a/drivers/usb/core/config.c +++ b/drivers/usb/core/config.c @@ -191,7 +191,9 @@ static const unsigned short full_speed_maxpacket_maxes[4] = { static const unsigned short high_speed_maxpacket_maxes[4] = { [USB_ENDPOINT_XFER_CONTROL] = 64, [USB_ENDPOINT_XFER_ISOC] = 1024, - [USB_ENDPOINT_XFER_BULK] = 512, + + /* Bulk should be 512, but some devices use 1024: we will warn below */ + [USB_ENDPOINT_XFER_BULK] = 1024, [USB_ENDPOINT_XFER_INT] = 1024, }; static const unsigned short super_speed_maxpacket_maxes[4] = {